The LEGO Harry Potter Years 1 – 4 video game is now available for the iPhone, and to celebrate its release Warner Bros. has just launched a sweepstakes. The prizes of the sweepstakes are the LEGO Harry Potter Years 1 – 4 video game for the iPod touch, an iPod touch to play the game on, and a LEGO Harry Potter Castle building set. The sweepstakes is open to residents of the US who are thirteen years old or older, and you can enter here.